Muffler for engines.



J. M. SMITH. MUFFLER FOR ENGINES.

APPLIGATION FILED DEC. 9, 1911.

1,953,661; Y Patented Feb.18, 1913. I

IIIWENTOR:

jdamss' M- Smith "ZMMW/ 30 v w Y.

SHWZIH, OF IHILADELPHIA, PEN C" 1325 ADSI'E TtIAG'R'UDEB, 9F BEYN MAWE,

NSYLVANIA, :iSSIG'NOB F ONE-Edith" 230 rEnNsYLvAnra.

ar'nrrtlnn non enemas.

Application filed December To all whom it may concern Be it known that. 1, JAMES M. S n'rn, a

citizen of the United States, residing at- Philadelphia. in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Mutllers for Engines; and I do hereby clare the followingto be a full. clear, and exact description of the ll ventiou, such as will enable others skilled in the art to which it appertains to make and use the same, erence being bad to the accompanying tags, and to'characters of reference marked thereon, which form a part of this specification.

This invention has reference. generally, to improvements in muiliers for engines; and, the invention, relates more particularly, to a novel device of the general character hereinafter set forth, which is to be employed in connection with explosive gas or other engines for the purposes of deadening or Inufiing the sound made by the exhaust. from the engine-cylinder, the device being constructed in the :t'orni of an exhauster which acts to more readily withdraw the exhaust gas from the engine-cylinder and dispel the same into the air without noise.

The present invention has for its principal object to provide'a novel and simply constructed, as well as an effectively operating, i'nuilling device for engines, which is especially adapted for use 'in connection with explosive gascngines, and

is more parlicularlv for the purpose of allowing the exploded or exhaust gas as it exhausts or escapes from the cylinder of the engine to expand noisclc.-;sly into arelict'chainlmr, from which, owing to the construction of the auditing device the expanded "as within said rclief-chau'iher is withdrawnhy suction, in-thc manner of an ejector and by the primary action of a portion of tho exploded gas from the cylinder of the engine. and expelled IlUlSLlthSl V from an eduction member into the air. ()ther objects of this invention not at this time more particularly cnuuieraicd will ho clearlv understood from the detailed dcscription of the presentinvention.

lVith the various objects of the present invention in view, the invention cousists, primarily, n the novel nlufiler'ol the general character hereinafter forthrand. the itr vention consists, furthermore, in the various Specification of Letters Qatent.

draw ciples of the present invention,

Patented Feb. 18, 1913.

Serial No. 664,888.

arrangements and combinations of the several devices and parts, as well in the details of the construction of the said parts, all of which Willbe more fully described in the following specification, and then finally embodied in the clauses of the claim which are appended to and which form an essential part of the said specification.

The invention is fully illustrated in the accompanying drawing, which illustrates a inufiier showing one embodiment of the printhe niuflier eing represented in transverse vertical section, with a certain portion thereof in elevation,said view illustrating also,in elevation, a means of connection of the muffler with the exhaust-duct or ducts of an engine-cylinder, a portion of the cylinder being also represented in said drawing.

teferring now to the said drawing, the

reference-character 1 indicates any desired construction of cylinder of an explosive-gas engine, said cylinder being provided with a suitable exhaust-chamber,as 2,with which is connected an exhaust-pipe I), and in which is arranged by means of a Tfitting, as 4, or in any other suitable.manner,a second exhaustpipe 5 leading from the usual exhaust chamher in the upper portion of the engine-- cylinder, but not here shown. Connected with the said fitting 4 is a pipe 6, an elbow 7, and pipe 8, from the screw -'threaded portion of which the n'iutlling device enibodying the principles of the present invention is suitably suspended.

The iuuliling device consists, essentially. of a suitable cylindrical shell, as 9, provided at the top with a head l() and at the bot-tom with a head 11, the head being formed with an annular flange l2 and annular rib 13. forming an annular groove or depression 14, and the said head 11 being similarly formed with an annular flange 15 and annular rib l), forming an annular groove or depression 1T. lacking rings, 18 and 19, are arranged in the respective grooves or depressions 1-1 and 17, so as to produce tight joints between the heads and the respective ends of the cylinder or shell 9, as will be clt-arlvi-indcrstood from an inspection of the drawing. I

The upper cylinder-head 10 is formed with a screw-threaded opening 20 into duct 23, suitable lock-nuts 24- and 25 being screwed upon said screw-threaded end-portion and arranged upon the opposite side of said cylinder head 10 for securely and rig idly securing the said pipe or duct 23 to the said cylinder head 10 and within the cyliir der 9, as will be clearly evident. The ext'reme upper end-portion of the saic pipe 23 extends beyond the said lock-nut 24, and is connected With the screw-threaded portion of the pipe 8 by means of an internally screw-threaded sleeve or union 26 so as to establish a direct passage from the exhaust-chamber 2 of the engine-cylinder into the said pipe or duct 23. The lower end-portion of the said pipe 23 is also externally screw-threaded, as at 27, and is provided with an internally scre w.-threaded ring or union 28 which is screwed upon said screw-threaded 527.

of Which Will he presently more fully set I e ring :28 is the upper screw-threaded portion 31 of an edhction pipe or piece of tubing 30, the said pipe or tubing 30 being provided With a series of suit-ably placed holes or openings 32 within the relief-chamber formed by the cylinder 9, and the said pipe or tubing 30 extending through'a suitable hole or opening 33 in the lower cylinder-head 11. The lower end-pun tion of the said pipe or tubing 30 is also externally screw-threaded, as at 34, and i upon the said screw-threaded portion 34: is

. connected .With the said vsot-id a suitable loclenut 35. The cylindrical wall of the pipe or duct 23 is provided with any desirable number of suitably disposed holes or perforations 36, which radiate toward or from the longitudinal central" axis of the said pipe 23, the centers of the said holes or perforations being preferably arranged in such a'manner so that they are upon an imaginary line, forming a helix-around the outer cylindrical surface of the said pipe 23. Within the lower end-portion of the, said pipe or tube 23, and suitably held in l position by means of the assembled pipes 23 I and 30 and the connecting link 28, subsiantially in the manner shown in the drawing, is a gasexpanding member or element 3?, member or element 37 being: formed l a cone-shaped portion 38 which is inlet 39and an outlet with for'med with a narrow 40 extending from the said inlet-portion and said outlet being much Wider at its discharge-end, than at the point where it is inlet-portion. K. When I the several ils of the relief-spring 29 have been suitably compressed, so as to lie in close contact as illustrated, the coils ofthe said spring Will close the previously mentioned I holes or perforations 36 in the pipe 523, the

spring-coils having such resiliency so as to produce a retarding effect from the ing or exhausted steann or the like ing the escape of the same through i. holes or perforations from within pipe 23 into the relief-chamber a l by the cylinder 9 and its heads 10 and the passage of the compressed hausted ,gas or steam will be etl'ected. Within the said relief-chamber the said gas or steam is permitted to expand and thereby lose its expansive poweru as will be clearly evident. It will be seen firm. inspection of the drawing, that some l exhausted gas or steam when receive in the interior of the pipe 23 will al i into the inlet-portion oi? the ing member or element 3?,the fxlltiilbt i or steam passin from said inlet-me 39, in the form or a jet, into the cutter i )1" tion -10 and into the eduction tube or pipe This portion of the gas or steam as it h the inlet-portion 39 of the saideleniei member 37 suddenly expands to its t'ul tent, "and in passing dew'nwardlythe said pipe or duct 30 and pa perforations 32, creates a iacurm suiticient suction for the withdrawal. of fully expanded. and dead gas or steam a in the reliet-rhainlwr all. from the said her through the said g'ierforations or ii and into the eduction pipe or tube 30 which the said gas or steam noiselcpasses into the air.

From'the above description of the presinvention, it will be clearly seen that l in devised a simply constructed operating muiiler, which is especially ad ed for use with explosiv which may also be used in connection xvi steam and other engines; and, in tact, wi mechanisms of the various kinds from whit 1 compressed gasor steam or other sui'al medium is exhausted, to deadcu and entiif overcome the noise made by such'exhausti medium.

I am fully aware that the present int-ention is capable of changes in the various :1?- i'ann'ements and combinations of the several 11;; devices and parts as ncll as in the details of the construction of the same, without departing from the scope of the said invention as hereinbefore setforth. and aside: fined in the claims which a re appended thereto. Hence, I oonot limit my invcn tion to the exact member providing a relief-chamber, a

. element within said cylinder,

weasel lar element connected with and extending into said relief-chamber adapted to receive the exhausted medium, said tubular element being provided with radially extending and helically disposed perforations for conveying the exhausted medium into said reliefchamber, a coiled relief-spring encircling the outer surface of said tubular element, the central helical pitch-line of the coils of said spring corresponding to an imaginary helical line around said tubular element on which said holes or perforations have their centers, and a gas-expanding element connected with said tubular elementi nto and through which a portion of the exhausted medium is passed, said gasexpanding element having a contracted inlet-portion and a flaring outlet-portion into and through which a portion of the exhausted medium is passed. to extract the exhausted medium by suction from said relief-chamber.

2. In a mufiler for engines, a chambered member providing a relief-chamber, a tubular element connected with and extending into said relief-chamber adapted to receive the exhausted medium, said tubular element being provided with radially extending and helically disposed perforations for conveying the-exhausted medium into said reliefchamber, a coiled relief-spring encircling the outer surface of said tubular element, the central helical pitch-line of the coils of said spring corresponding to an imaginary helical line around said tubular element on which said holes or perforations havetheir centers,

element, an eduction-pipe inder,

vided with perforations for conveying the exhausted medium from said tubular element into the relief-chamber formed by the said cylinder, a coiled relief-spring encircling said tubular element, an internally screw-threaded rin screwed upon the lower screw-threaded end -portion of said tubular opening of said lower cylinder-head, said eduction pipe having a screw-threaded portion screwed into the said internally screw threaded ring, and the said eduction pipe being provided with a series of perforations, and means between said tubular element and said eduction pipe for exhausting the exhausted medium by suction from the reliefchamber into said eduction-pipe, substan tially as and for the purposes set forth. 4. A muffler for engines comprising a cylandcylinder-heads at the respective ends thereof, said cylinder-heads being provided with centrally disposed openings, the opening in the upper cylinder-head being internally screwthreaded, a tube-like element Within said cylinder, said tube-likeelement being externally screw-threaded in its upper end-portion, said screwuthreaded portion being screwed into the internally screwthreaded opening of said upper cylinderhead, said tubular-element being also externally screw-threaded upon its lower end portion, and said tubular element being provided with perforations for conveying the and a gas-expanded element connected with said tubular element into and through which a portion of the exhausted medium is passed,

said gas-expanding element having a contracted inlet-portion and a flaring outletportion into and through which a portion of the exhausted medium is passed, and an cjectorpipc connected with said gas-expanding element, said pipe being formed in its sides with perforations through which the exhausted medium is ext acted by suction from said relief-chanibcr.

3. A nnltller for engines comprising a cylinder, and cylinder-heads at the respective ends thereof, said cylinder-heads being provided with centrally disposed openings, the opening in the upper cylinder-head being internally screw-threaded, a tube-like said tube-like element being externally screw-threaded in its upper ei'id-pm'tion, said screw-threaded portion being screwed into the internally screw-threaded opening 'of saidupper cylinder-head, said tubular element being also; externally scrmv-tlneaded upon its lower end portion, and said tubular element being prol l l l exhausted medium from said tubular ele ment into the relief chamber formed by the said cylinder, a coiled relief-spring encircling said tubular element, anrinternally screw-threaded ring screwed upon the lower screw-threaded endport'on of said tubular element, an eduction-pipe arranged in the opening of said lower cylinder-head', said eduction pipe havingla screw-threaded portion screwed into the said internally screwthreaded ring, and the said eduction pipe being provided with a series of perforations, and a gas-expanding element between the said tubular element and eduction pipe, said gas-expanding element being provided with a contracted inlet-opening and a flaring outlet-opening into and through which a portion of the exhausted medium passes and is expanded and by suction exhausts the exhausted medium from the relief-chamber into said eduction pipe.

In testimony, that l claim the invention set forth above I have hereunto set my hand this 5th day of December. 1911.

JAMES M. Sh'IITH.

/Vit-nesses Gnonon D. Rmn \uns,v CHARLES A. ll'lxunnnaa.

arranged in the v 

